Hamilton LC (2004). Statistics with Stata, Version 8. Thomson Brooks/Cole.
Student
Companion Site.
(Note that this edition of the book is based on version 8 of Stata, the
current version of the package. Earlier versions of this book are based
on earlier versions of Stata. Make sure that you get the version of the
book compatible with the version of that package. There are significant
changes between version 7 and 8 of Stata.)